\Java
Stars.java
```//********************************************************************
//
// Classname.java
//
// Author: Josh Santomieri
// Author's email:
// Author's WWW URL: http://www.santsys.com/
//
// Course, section, and quarter: CPE 101-02 Fall 2001
// Department: Computer Science
// School: Calif. Polytechnic State Univ.
// Address: San Luis Obispo, CA, 93407 USA
//
// History:
//
//
//********************************************************************
//
// Program Description and Design Overview:
//		Create a program that draws Stars. The program must draw 4 different
//		kind of star patterns by printing sequences of asterisks and blanks
//		(spaces) on the screen with nested loops.  The Stars.java program on
//		page 150 of your textbook is one of the four kinds of patterns your
//		are shown here (including the original).  Notice that the star patterns
//		may have different number of rows.  Patterns are named A, B, C, and D
//		(left to right below).
//
//		*           **********               *            *
//		**           *********              **           ***
//		***           ********             ***          *****
//		****           *******            ****         *******
//		*****           ******           *****        *********
//		******           *****          ******       ***********
//		*******           ****         *******      *************
//		********           ***        ********
//		*********           **       *********
//		**********           *
//		***********
//
//		Your program must prompt the user for the number of rows and the pattern type
//		(A, B, C, and D).   Then print a star with the selected pattern and size.  It
//		should then print 3 blank lines and prompt the user again.  If the user enters
//		zero or a negative number of rows, the program should end.  Otherwise, loop and
//		draw another star pattern
//
//
// Input Requirements:
//      number of rows
//		row pattern (A, B, C, or D)
//
// Output Requirements:
//		prompt user for number of rows (if number is less than or equal to zero, stop program)
//		prompt user for type of pattern
//      pattern of stars (A, B, C, or D)
//		same amount of rows as entered
//		3 blank lines
//
// Program Preconditions:
//      number of rows must be an integer
//
//********************************************************************

import java.io.*;

public class Stars
{

//-----------------------------------------------------------------
//  a program that draws Stars in the shape and amount of rows that user entered
//-----------------------------------------------------------------
public static void main (String[] args) throws IOException
{
int numRows = 0;
String option = "";
String sMax = "";

// get the pattern type
do {
System.out.println("Enter a shape pattern (A, B, C, or D):");
} while(!option.equals("A")
&& !option.equals("B")
&& !option.equals("C")
&& !option.equals("D"));

// get the number of rows
System.out.println("Enter the number of rows:");
numRows = Integer.parseInt(sMax);

// if less than one row, exit.
if(numRows < 1) {
System.out.println("Nothing to print. Exiting.");
return;
}

System.out.println();

// draw the selected pattern
if(option.equals("A")) {
for(int row = 0; row < numRows; row++) {
for(int stars = 0; stars < row + 1; stars++) {
System.out.print('*');
}
System.out.println();
}
}
else if(option.equals("B")) {
for(int row = 0; row < numRows; row++) {
for(int j = 0; j < row; j++) {
System.out.print(" ");
}

// draw the stars
for(int k = 0; k < numRows - row; k++)
{
System.out.print("*");
}
System.out.println();
}
}
else if(option.equals("C")) {
for(int row = 0; row < numRows; row++) {
for(int j = 0; j < numRows - row - 1; j++) {
System.out.print(" ");
}

// draw the stars
for(int k = numRows - row; k <= numRows; k++)
{
System.out.print("*");
}
System.out.println();
}
}
else if(option.equals("D")) {
for(int row = 0; row < numRows; row++) {

for(int j = 0; j < numRows - row - 1; j++) {
System.out.print(" ");
}

// draw the stars
for(int k = numRows - row; k <= numRows + (row * 1); k++)
{
System.out.print("*");
}

// pad the right (not sure we need this, but why not...)
for(int j = 0; j < numRows - row; j++)
{
System.out.print(" ");
}

System.out.println();
}
}

// end with 3 blank lines
System.out.print("\r\n\r\n\r\n");
} //end main

} // end class Stars```